The FN P90 has a 50 round magazine.
The original AK-47 had a cyclic rate of fire of 700 rounds per minute. The "modernized" AKM (manufactured from 1959 onwards) had a cyclic rate of fire of 600 rounds per minute. Cyclic rate of fire meaning that, if you had a magazine with such a capacity loaded, and you just held down the trigger, and you could fire off as many rounds without the weapon overheating and becoming defective.
Six. All revolvers, with the exception of one or two specialty peices, fired Six.
16 thousand rounds.
The original Colt 45 (1873) was a single action pistol with a revolving chamber that held 6 rounds. Single action meant that the hammer had to be cocked before pulling the trigger or, in other words, the trigger simply released the hammer, it did not arm it as well, as in the case of a double action pistol. This is why you would often see the cowboy (Roy Rogers, for instance) madly fanning the hammer of his Colt with the palm of his hand while holding the trigger with the other, to effect rapid fire of several rounds. It does not, however, explain how they could fire so many shots without reloading.
As many as you want - assuming you reload. The barrel may well suffer a bit after about 2,000 rounds but it will continue to fire for many more thousands after that. A standard magazine of 10mm rounds carries 15 rounds but that can be lowered as an "optional" extra to 10 rounds - if you want to.
30 rounds = stick mags, 45-70 rounds = drum mags
12-20 rounds depending on caliber and magazine.
2
Cyclic rate is 800 - 1000 rounds per minute. Rapid fire rate is 200 rounds per minute. Sustained rate of fire is 100 rounds per minute.
The fire rate of miniguns starts from around 2000 rounds per minute and minigun that has the fastest rate today shoots close to one million rounds per minute.
Rounds per minute probably refers to how many shots a firearm can fire off in a minute.
About 600 rounds per minute on full auto.